Cutter chain



Patented Oct. 7, 1930` UNITED STATES PATENT. OFFICE FRANir CARTLIDGE, orCINCINNATI, OHIO, AssIGNon To BERTRAND r. TRACY, F

i s. y rITTsIsURGH, PENNSYLVANIA ;oUTTER CHAIN` Application ledVQctolierlZ, 1929; Serial iNo. '396,676.`

This invention relates to cutter chains and particularly to cuttingtools and supplementary sockets therefor. n

Heretofore cutter chains of the endless type have .been constructed andemployed for of success; prior artv devices have each been" providedwith a socket for receiving the, bit of thefcuts ting tool. This `form.`otconstruction has v proven unsatisfactory because the wall of thesockets break downV and allow the bit of the cutting tool to move in thesocket. With continued use of the chain, the links Vin which the socketsare located finally break or become so battered and worn that new linksmust be replaced inthe chain and the replacements of the links have beenso frequent that maintenance charges have been very '2Q high andexpensive.

Removable supplementary sockets have also been tried and applied tocutter chains of the type referred to above, but Vhave not provensatisfactory because the supplementary sockets have failed in practicein substantially the same manner as the cutter chains which did notinclude supplementary sockets. Y

Accordingly7 it is an object of the present invention to provide animproved supplementary tool bit socket for links of cutter chains thatshall be simple in construction, efiicient in operation and easilymanufactured and installed.

vAnother object of the invention is to provide an improved supplementarysocket and tool bit that shall not become loose and there by break downthe walls of the socketV in the link. A further object of the inventionisto provide for rigidly supporting the bit o a cutting tool in thesockets of the cutter chain links.

Other objects of the invention will, in part, be obvious and will, inpart, appear herein- 'after fromthe following description taken inconjunction with the accompanying drawL y.

ings in which Figure l is a view in perspective of a link plementarysocket; A breasting coal in mines with varying degrees Thelinks of thechainsof .the

`socket2 ofthe link.

.for a cutter chain having a cuttingtool and supplementary socketarranged and constructed in accordance with the invention;

Fig. 2 is a view in perspective of the sup- Fig. 3 is a rear plan viewof the socket shown in Fig. 2;

Fig. 4 is a view in perspective of the cut-` ting tool shown in Fig. l;and V Fig. 5 is a rear plan view of the cutting tool shownvin Fig. 4.

In F ig. l of the drawings a male link l for a cutter chain is shown;Since cutter chains embodying the Alink l Vareemploved in the coalfields for-breasting coal` and are well V known in the-art; it is notnecessary toshow and describe` in `detail a complete cut-ter" chain. p YI fThelinkl-is vprovided. with a socket 2 inclined at an angle withreference to flangesB of the link. The socket 2 is preferablyrectangularly in transverse section. The long sides 4 of the socket 2arepreferably pro` vided `with semi-circular recesses 5 and 6 eX-tending the full depth of the socket.'

A supplementary socket 8 having a slot 17 of substantially -Vshape isdisposed in the socket 2. The supplementary socket 8 is provided .withflanges 9 and `l0 that aregdisposed to seat upon thelink l adjacenttothe short sides ofthe Asocket 2. The socket 8 isv also provided withlongitudinallyextending circular bossesllon vthe outer `faces of thelegs l2 of the socket,'.the bosses 1l being disposed to fit snugly intothe recesses 5 and 6 of the Inorder that the supplementary socket 8 beheld firmly in thesocket 2, a slot 13 is provided at the lower endthereof. The lower end of the socket 8 may then be spread or 90 flared.outwardly as indicated by the Vbroken lines in Fig. 3. The supplementarysocket 8 may, therefore, vbe driven into the socket 2 and held firmlytherein bythe friction exerted between the lowerend of the member 8 `9:5and the walls of thercesses 5 and 6 of the socketj 2. 1

Since the supplementarv socket-8 is removl able from the link l, it maybe made of metal that will withstand the strains to which itis subjectedin practice Without undergoing any material deformation. Thesupplementary socket 8 may also be heat treated so that the desirablemetallurgical characteristics may be obtained conducive to long life.

Since the sides of the supplemental socket is provided With thesemi-circular bosses v11, the thickness of the Walls is such that greatstrength and rigidity are obtained. The metal ofthesimplemental socketwill, therefore, not be fatigued to such an extentthat' it will breakdown or crumble in operation. The cost of maintenance of cutter chainsin-k cluding the supplemental-socket Siof the type shown and describedWill, therefore, be reduced to a minimum.

The supplem'entray socket 8 is disposedto receive a cutting tool bit15,'the-upper'end of which terminates-in awcuttingpoint 16.

.The tool bit and the cutting point 16 are vented fronr movinglongitudinally of the supplementary socket 8, the bottomof-.tlieV-sliaped slot 17 in the socket and the edge-18 of theL` tool bit are"provided With notches similar to savs7 teeth. When the tool bit 15 @ismounted in place as .shown inv Fig. 1, the

notches inthe bottom of the V-shapedslot of the tool bit intermesh totherebyv preventl the toolv bit from moving:longitudinallyv of the-V--shaped fslot' 17 in the' supplementary socket 8l. A

In order tofir'mlyt locky the cutter toolfbit 15 and vthe* supplementarysocket in place, av setscrewf21 may beA providedY (see Fig. 1).`

The set screw- 21rextends longitudinally along the top 'of the/linkfandthe end thereof'presses firmly against Ythe broad edge 22 'of the'toolbit 15.

While onlyvthe male link for a cutter chain has been shown, it is toVbeunderstood 'that y the femaleflinks may be similarlyconstrulcted so.far asthe supplemental socket'S vand the slot therein of substantiallyV-shape, and a cutting tool having a bit of substantially V- shapedisposed i'n the slot of the supplemental socket in complementalrelation thereto.

2. In combination, a link for a cutter chain having afsockettherein andlongitudinally extending recesses-in thewallsof said socket, asupplemental socket disposed in the socket, said supplementalsockethaving longitudinally extendingbos'sesf'disposed" in Ycomplementalrelation "to the longitudinally extending. recesses, said supplementalsocket being provided also With a tool bit receiving slotofsubstantiallyfVi-shape in section, and a cutting tool including a toolbit of substantially V-Shape-disposed in theslotfof the supplemental.socket 'ini complemental relationthereto.

3-.1-A`-suppleme1ita1l socketfor a cuttercham having aL slot/ofsubstantially 'V-shapef thereinl and sawA tooth like projections-at thebot-` scribed: myf name this thday1 of September,

' FRANK' f CART-LID GE;

`17 andy the notches :disposed along thev edge cutter bit 15 areconcerned. The emalelinks 'j mayv be provided with a socket 2in .thesame:manner as the male link 1.

Vhile various modiications and `|changes may be made Vin the-cutterchainllinks andfthe y supplemental-sockets and the cutter bits Withoutdeparting fromv the spirit and kthe scope of the-inventiomit is Vto* beyunderstood that only such limitations shall beplaced on the inventionasV areimposed by the prior art' i and the appended claims.

What -I claim as lnew andV desirev Vby Letters-Patentis:

to secure 1. In-combinatioma linkfo'ra cutter chain

